Here it is, the perfected now so called LEDLENSER V2 Neo. 
With 9 x Luminus SFT-25R G1 BC (highest flux bin at 6500 K) it reaches 6510 lm after 5 sec. at 51000 lx.
(Lowest brightness: 112 lm at 880 lx) - measured in each case with 2 x Samsung INR21700-50S.
With both 21700s, the LEDLENSER V2 Neo weighs 744 g. The thing feels like a single piece of metal anyway. At room temperature, the lamp can run on turbo for about 2 minutes before it gets very warm. The brass pill simply has a high thermal mass which works great in the stainless steel host.
Here are a few beam shots, each on Turbo.
The trees in the background are 80 meters away.
Slightly less than Turbo (50-60%):
Even lower mode (20-30 %):
The LEDLENSER V2 Neo project is now officially complete. The work involved amounts to several dozen hours, not counting the printing time.